Thursday, 24 August 2017
CRI: Now you know!
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Take a look. The color of the apples range from a rich red to a dark fuchsia.   Which apple looks more appetizing? Why?  It all depends on the light!

The color rendering of objects exhibits how well the shades are perceived by the human eye.  The Color Rendering Index (CRI) scales from 0 to 100 percent; the more accurate the color appears, the closer the CRI moves to 100 percent.  For example, have you ever looked at yourself in a hotel bathroom mirror and thought, “Wow, my skin tone looks different.”   More than likely, you were a victim of poor CRI. Light sources such as high-pressure sodium or white fluorescents can sometimes produce less than 50 CRI.  On the spectrum, the way our brain identifies these colors can not only affect our mood but our recognition of “good quality” in foods and the susceptibility to find retails products appealing to our eyes. Example A is the apples.  The far left apple looks the most appealing; it has a CRI of 97 percent, near perfect.  It is most true to the actual hue.  The apple on the far right only renders a CRI of 70 percent. 

Also, take for instance the picture of the blue/black vs. white/gold dress that went viral in 2015.  

CBS News explained, “Different light sources throw off light of different colors. Sunlight is very yellow. Shade casts a bluish hue. This changes the color of light reflecting off an object and into your eye. But the reason we don't see the color of a flower differently in sunlight versus shade versus under an incandescent or fluorescent lamp is that our brain takes account of the illumination changes and adjusts our perception accordingly.”

To conclude, the higher the color rendering index, the better its color rendering capability. Fluorescent lights are considered quite poor in CRI as they have a score of 70. A CRI index that is higher than 80 is considered to be an ideal lighting solution. For that reason, LED downlights and other LED bulbs are the best replacements for incandescent bulbs, considering that most LEDs have a CRI above 80.

Color rendering influences our decisions on a daily basis.

Now you know!

Read more: Science explains why people can't agree on the color.

 

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Posted on 08/24/2017 1:50 PM by Valet Enegy
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Thursday, 17 August 2017
LED Lighting for Dummies
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What is LED?

Light Emitting Diodes (LEDs) are semiconductor devices that produce visible light when an electrical current passes through them. It is basically digital light that comes with an abundant amount of benefits.

It is a highly energy efficient lighting technology and has the potential to fundamentally change the future of lighting in the US.  Using LEDs will slash long-term operating costs and drastically reduce energy use.

“Widespread use of LED lighting has the greatest potential impact on energy savings in the US. By 2027, widespread use of LEDs could save about 348 TWh (compared to no LED use) of electricity: This is the equivalent annual electrical output of 44 large electric power plants, and a total savings of more than $30 billion at today’s electricity prices.” -Department of Energy  

What are the benefits of LED lighting over traditional light sources?

LED lighting differs from incandescent and compact fluorescent lighting (CFLs) in several ways.  LED is more efficient, durable, and longer lasting.

Energy-efficiency: LED lighting offers energy savings of 80-90% over incandescent technology and up to 50% over fluorescent lamps.

Longer life: With typical lifespans of up to 50,000 hours, LED lasts 2 or 3 times longer than fluorescent lighting, and up to 50 times longer than incandescent. Maintenance costs are vastly reduced as a result.

Instant light: Unlike many fluorescent lights, LEDs require no warm-up time to reach full brightness.

Eco-friendly: LED lights are free of toxic chemicals and 100% recyclable. LED lighting has potential to drastically reduce carbon emissions. Around 20% of the world’s electricity is used on lighting. Unlike fluorescent lamps, LEDs contain no mercury, making disposal easier and cleaner. Longer lifespan relieves pressure on landfill sites. A big step towards a greener future!

Reduced heat output: LED emit very little heat. Incandescent bulbs release 90% of their energy as heat and CFLs release about 80% of their energy as heat.

Durability Quality: LEDs are a solid state form of lighting, resistant to vibration and shock. They are less delicate than incandescent or fluorescent lamps and outperform competing technologies in cold temperatures.

What’s the bottom line?

LED is by far the most energy efficient, the cleanest, and most eco-friendly way of providing light.  The upfront cost is more expensive because you’re paying for the technology but it will dramatically minimize your power bill every month.  You are also saving money and energy in maintenance and replacement cost, due to the long lifespan of LED lighting.

 

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Posted on 08/17/2017 8:44 AM by Valet Energy
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Tuesday, 8 August 2017
Product Tuesday: EcoSense TROV
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The EcoSense TROV is a linear LED lighting platform designed for the needs of the lighting design community.  It provides a solution for cove lighting, wall grazing, wall washing, line of light accents, and uniform asymmetric lighting. 

TROV has interior and exterior options with a flicker-free dim to zero technology.  With the exclusive “Flip to Flat” hinge design, it allows vertical aiming from 0-180 degrees and a compact profile measuring in at 1.38” high.  It has a broad range of CCTs, which includes 2200K and 2500K color temperatures along with high CRI (Color Rendering Index) options.

This technology was conceived to meet the most challenging design applications. With over 20,000 product variations, it adapts to any environment giving designers more freedom and choice in their work.

Find out more about this product at EcoSense TROV.

 

 

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Posted on 08/08/2017 1:37 PM by Valet Energy
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Friday, 4 August 2017
Name That Technology
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Incandescent Light

Incandescent bulbs are extremely inefficient, but a very inexpensive light source.  When power is applied, the filament glows, which generates heat, that produces light (incandescence).

When there are no more particles to burn, the light bulb burns out, which typically takes place 800-1000 hours into the life. Incandescents, also, produce a lot of heat; they produce 90% heat and 10% light.   

Thomas Edison is well-known as "the inventor of the light bulb," but in reality, he is only one of several researchers that created electrical incandescent lamps in the 1870s. These researchers include Joseph Swan, Frederick DeMoyleyns, and St. George Lane-Fox in England, as well as Moses Farmer, Hiram Maxim, and William Sawyer in the US.

What makes Edison’s contribution to electric lighting so extraordinary is that he didn’t stop with improving the bulb. He developed a whole suite of inventions that made the use of light bulbs practical.

They are much less energy efficient than most types of electric light sources. They have been replaced in many applications by fluorescent lamps, compact fluorescent lamps (CFLs), high-intensity discharge lamps, and light-emitting diodes (LEDs).

Read more: Incandescent Light - History Of Incandescent Lamps - Resistance, Filament, Electricity, and Current - JRank Articles

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Posted on 08/04/2017 3:38 PM by Valet Energy
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